February 11 , 2016. EN. Masaya , Fuego , Sakurajima ( Aira ) .

Masaya , Nicaragua :

Masaya volcano has increased to almost double its magma movement and its seismicity, said today the Nicaraguan Institute of Territorial Studies (INET). The signals of the amplitude level of the tremor in real time (MRS, for its acronym in English), measured every ten minutes, which under normal conditions varies between 150 and 620 units on the Masaya, exceeded the value today 1000, said the INETER in its statistical report after twelve hours of surveillance. The MRS real-time measurements indicate the total activity of a volcano, the movement of magma, rock falls and even earthquakes, and is one of the tools volcanologists to evaluate a possible eruption.The volcano has caused alarm among the population of Pacifico Nicaragua , Tuesday , when it generated a series of earthquakes of magnitude M 4.1 on the Richter scale, without damage or significant losseshave been reported.

Sakurajima , Caldeira Aira , Japan :

31.593°N, 130.657°E
Elevation : 1117 m

JMA reported that an explosive eruption at Showa Crater (at Aira Caldera’s Sakurajima volcano) began at 1856 on 5 February and generated an ash plume that rose 1.3-1.8 km above the crater rim. Lightning was observed in the ash cloud, and incandescent tephra was ejected as far as 1.8 km onto the flanks. The Alert Level was raised to 3 (on a 5-level scale); it had previously been lowered to 2 on 25 November 2015. During an overflight the next day scientists did not see any significant changes to the crater; a plume obscured views of Minamidake summit crater. Sulfur dioxide emissions were 100 tons/day, which was the same level measured on 3 February.

Explosions were detected on 8 February. Based on JMA reports and satellite data, the Tokyo VAAC reported that during 8-9 February ash plumes rose to altitudes of 1.5-3.3 km (5,000-11,000 ft) a.s.l. and drifted E and SE.